Ethama, Water Sculptor

At the beginning of your upkeep, put a +1/+1 counter on Ethama, Water Sculptor. If there is more than three +1/+1 counters on Ethama, Water Sculptor, remove all +1/+1 counters from it. If you do, create a 3/3 Blue Artifact Ship token with Flying, Crew 2 (Tap any number of untapped creatures you control with total power N or greater: This permanent becomes an artifact creature until end of turn.)
{w}{u}: Draw a card.